<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="js/vue.js"></script>
	</head>
	<body>
		<div id="app">
			<h3>{{counter}}</h3>
			<h3 v-once>{{counter}}</h3>
			<button @click="counter++">++</button>
		</div>
		<script type="text/javascript">
			new Vue({
				el: '#app',
				data: {
					counter: 0
				}
			})
		</script>
	</body>
</html>
